Rotary air-compressor.



. PATENTED AUG. 7, 1906.

G.'HERMANSEN.

ROTARY AIR COMPRESSOR.

I APPLICATION rum) MAR.17, 1905.

2 SHEETS-SHEET 1.

- lw/Emm No. 828,111. PATENTBD AUG. 7, 1906.

- G. HERMANSEN.

ROTARY AIR OOMPRESSOR. I APPLIOATION FILED MAR. 17, 1905.

' 2 SHEETS-SHEET z.

III,

l 1 MM A/FFNEEEEE, P 5 Q INVENTEIF 4mm I azz-fw;

-' TE s ra'rns PATENT @FBIGE.

GUSTAV HERMANSEN, or ALBANY, NEW YORK.

ROTARY AIR-COMPRESSOR.

Specification of Letters Patent.

' Patented Au 7, 1906.

Application 'filed March 17,1905. Serial'No. 250,508-

tion and combination of partshereinaiter described and subse uentlyclaimed.

Reference may e had .to the accompanying drawings, and the referencecharacters marked thereon, which form a part of this specification. I

Similar characters refer to similar parts in the several fi res therein.f

Figure 1 o the drawings is an end elevation of a fluid pump orcompressor constructed in accordance with my invention. Fig. 2 is avertical cross-section of the same, taken on the broken line 2 2 in Fi3. Fig. 3 is a central vertical longitudina section of the same, takenon the broken line 3 3 in Fi s. 1 and2. Fig. 4 is a longitudinal section0 the piston, taken on the broken line 4 4 in Fi 2.

The object of my invention is to provi e a simple, durable, andeflective pump or compressor for fluids.

In describin my invention I shall refer to it more particu arly as anair-compressing apparatus, although it is also adapted for use asa ump.

I l iave shown in the drawings and will describe the invention asapplied to a sim le fluid compressor or pump operating sing y; but theapparatus shown may form one of a plurality or series of elements in acompound compressor or pump when suitably connected up with othersimilar elements.

Referring to the drawings, 1 is the frame of the machine containingbearings for the drive-shaft 2, which may be rotatively operated in anyknown manner, as by a belt and pulley. (Not shown.) U on the driveshaftis fixed a piston 3, a apted to rotate within and eccentrically of acylinder 4,

having heads 5, adapted to bear upon the ends of the piston to make acomparatively tight oint therewith.

The c hnder is rotatively mounted by means 0 ball-bearin s 6 at each endupon a bearing;plate 7, whic is adjustably mounted upon t e frame of themachine by means of screws 8, inserted through slotted apertures 9 inthe frame of the machine into said bearin plate, whereby saidbearing-plates are ma e adjustable perpendicularly to the drive-shaft.Said ball-bearin s may be of any known form. The bearing-plates 7 andthe heads -5 of the cylinder are provided with central aperturessomewhat larger than the drive-shaft 2, which passes therethrou h. Thepiston is adapted to rotate within t e cylinder eccentricallyand incontact therewith, and the cylinder is adapted to be rotated by thefrictional engagement therewith of the periphery of the piston. Thebearing-plates 7 are adjusted upon the frame of the machine, so as tocause the cylinder to thus engage the piston with the desired degree offorce to accomplish the rotative movement of the cylinder and also tomake a comparativel tight joint between the piston and cylin er at suchpoint'of contact, and when the bearing-plates are so adjusted they arelockedin position by means of the screw-bolts 8. F

. To facilitate the adjustment and add to the stability of thestructure, the frame of the machine is provided with one or more lugs 10overhanging each bearing-plate 7, through each of which lugs is inserteda screw-bolt 1 1, adapted to engage the peri hery of the bearin -plate.I have shown t e frame thusprovifled with three of such lugs andscrew-bolts for each bearing-plate; but a lesser number may be employed,if desired.

As shown, the cylinder and iston are adapted for contact with each 0t erat the top of the machine, and the slots 9 in the frame of the machineare elongated vertically to permit of a downward vertical adjustment ofthe bearing-plate screw-bolts 8.

The piston is provided with a slot 12, extending from its eripheryinwardly approximately in a ra ial direction, which slot is adapted toreceive a sliding pistonlate or abutment 13, which is adapted to e heldoutwardly by centrifugal force in engagement with the inner surface ofthe cylmder as the machine is operated. The piston is provided with oneor more inletorts 14 opening through its periphery to t e space betweenthe piston and c linder adjacent to the pistOn-plate'ononesi e thereofand with one or more outlet-ports 15 openin through its periphery to thespace between t e piston and cylinder adjacent to the piston-plate onthe opposite side thereof.

The inlet-ports14, of which four are shown,

extend inwardly to a common inlet-aperture 16, extending longitudinallythrough the body of the piston between its shaft aperture and peripheryand communicating with the atmosphere through the central apertures inthe cylinder-head and bearing-plate 7 and an inlet-aperture 17 in theframe of the ma chine.

Each of the outlet-ports is provided with-an automatic check-valve 16,which may be of any known form which is adapted to yleld only topressure applied thereto from the space between the cylinder and piston,and each of said portsextends approximately radially through the body ofthe piston to its shaft-aperture, whereat it registers with an openin18, leading from the periphery of the drive-s aft to a central chamberformed in said shaft, which is hollow.

. f The end of the hollow shaft is closed bya plug at 19, near whichclosed end the shaft is provided with one or more outlet-holes 20,communicating with an annular chamber 21,

formed in the bearing on the frame of the ma chine, which chamber'isconnected by a pipe '22 with a storage-reservoir (not shown) for 1 finedbecomes sufliciently compressed to .force open the check-valves 16 andescape through the outlet-ports 15 to the supplyreservoir. As the air inadvance of the piston-plate is thus compressedthe space be tween thecylinder and piston in rear of the piston-plate is automaticallyrefilled with air entering through the inlet-ports 14, which new supplyof air is in like manner compressed at the next rotatlon of the piston.

Certain of the structural features of my invention are adapted for usein a rotary en- What I claim as new, and desire to secure by LettersPatent, is p 1. In a machine of the class described, the combinationwith a rotatively-mounted cylinder; of a iston rotatively mountedeccentrically wit 'n the cylinder in contact therewith, capable ofunlimited rotative movement relatively thereto and adapted to rotatesaid cylinder said piston being provided with a longitudinal slot in itsperiphery, and

with an inlet-port in its periphery on one side of said slot, and anoutlet-port in its periphery on the opposite side of said slot; apiston-plate movably mounted in said slot, and; adapted to make contactwith the inner surcombination with a rotatively-mounted cylinder havinga continuous interior cylindrical surface; of a rotatively-mounteddriveshaft extending through enlarged apertures in the heads of thecylinder eccentrically thereto a piston fixed upon said shaft adapted torotate eccentrically within the cylinder in contact therewith, and torotate the cylinder by frictional engagement with its cylindricalinterior surface, said piston being provided with a longitudinal slot inits periphcry, and with an inlet-port in its periphery on one side ofsaid slot, and an outlet-portin its periphery on the opposite side ofsaid slot; a piston-plate movably mounted in said slot,

and adapted to make contact with the inner surface of the cylinder; anautomatic checkvalvecontrolling said outlet-port adapted to yield tointernal pressure in the space between the cylinder and piston; meansfor yarying the relative eccentric positions of the cylinder and pistonand means for rotating said piston.

3. In a machine of the class described, the combination with the frameof the machine having shaft-bearings; of a shaft rotatively mounted insaid bearings; a pair of bearingplates adjustable upon the frame of themachine perpendicularly to said shaft and provided with enlarged centralapertures through which said shaft extends; -means for securing saidbearing-plates in adjusted position upon the frame of the machine; acylinder rotatively mounted upon said bearing-plates eccentrically tosaid shaft; and a piston mounted upon said shaft adapted to rotatewithin said cylinder eccentrically thereof and in contact therewith.

4. In a machine of the class described, the

combination with the frame of the machine having shaft-bearings; of ashaft rotatively mounted in said bearings; a pair of bearingplatesadjustable upon the frame of the machine perpendicularly to said shaftand provided with enlarged central apertures through which said shaftextends; means for securing said bearing-plates in adjusted positionuponthe frame of the machine; a cylinder rotatively mounted upon saidbearing-plates eccentrically to said shaft; by means of ball-bearings.interposed between the cylinder and the respective bearingiston mountedu on said plates; and a shaft eccentrica ly within the cylin er.

5. In a machine of the class described, the combination with the frameofthe machine; of a shaft rotatively mounted thereon; a

pair of bearing-plates adjustable upon the frame of the machineperpendicularly to said shaft and provided with enlarged centralapertures through which said shaft extends; lugs on said frameoverhanging the peripherles of the respective bearing-plates screwsinserted "through said lugs engageable with the peripheries of therespective bearingplates; a cylinder rotatively mounted upon saidbearing plates eccentrically to said shaft and a piston mounted uponsaid shaft adapted to rotate; eccentrically within said cylinder incontact therewith.

6. In a machine of the class described, the

a combination with a rotatively-mounted cylinder having a continuousinterior cylindrical surface; of a rotatively-mounted driveshaftextending through enlarged apertures in the heads of the cylindereccentrically thereto; a piston fixed upon said shaft ada t- 1 ed torotate eccentrically within the cylin er in -contact therewith and torotate the cylinder by frictional. engagement with its cylindricalinterior surface, said piston being pro- I vided with a longitudinalslot in its periphery, and with an inlet-port in its periphery on oneside of'said slot, and an outlet-port in its periphery on the oppositeside of said slot; a piston-plate movably mounted in said slot, andadapted tomake contact with the inner surface of the cylinder; anautomaticallyoperated valve controlling said outlet-port; means forvarying the relative eccentric positions of the cylinder and piston;

and means for rotatin said piston.

7. In amachine of 51 in combination, a pair of members each rotativelymounted and ca able of unlimited rotative movement relatlvely to theother, the

e class described, and i l same comprising a cylinder, and a cylindricalpiston rotatively mounted within the cylinder eccentrically theretoincontact therewith, 'one of said members being provided with a slot andwith an inlet-port on one side and an outlet-port on the opposite Intestimony whereof I have hereunto set my hand this 11th day of March,1905. 1 GUS.- HE-RMANSEN. Witnesses: j JHENRY E. STERN,

A. SANDSTROM.

